Penelitian ini membahas tentang analisis faktor-faktor yang berhubungandengan perilaku tidak selamat pada Pekerja Proyek Ulubelu Unit 3 dan 4,Gheothermal Power Project di PT. X. Kecelakaan kerja secara umum disebabkanoleh dua hal yaitu perilaku kerja tidak aman (unsafe act) dan kondisi kerja yangtidak aman (unsafe condition). Heinrich (1980), memperkirakan 85% kecelakaanadalah hasil kontribusi perilaku kerja yang tidak aman (unsafe act). Berdasarkanhal tersebut, dapat dikatakan bahwa perilaku manusia merupakan unsur yangmemegang peranan penting dalam mengakibatkan suatu kecelakaan.Jenis penelitian ini adalah observasional dengan pendekatan kuantitatifmenggunakan desain penelitian cross sectional, Variabel independen ini meliputifactor personal (Psycological distress, Laziness, Mudah marah, Terburu-buru,pamer, dan Ketidaknyamanan), Faktor Pekerjaan (Jumlah pekerjaan, Timepressure), Faktor Manajemen (Pengawasan, Komitmen manajemen, dan Rewarddan Penalty) dan Faktor Kelompok (Tekanan kelompok). Variabel dependen yangditeliti adalah Perilaku Tidak Selamat. Sampel pada penelitian ini berjumlah 158responden. Analisis bivariat dilakukan dengan uji Chi Square. Berdasarkan hasilpenelitian, diketahui sebanyak 75 orang (47%) memiliki perilaku tidak selamat danselamat 83 orang (53%) yang memiliki perilaku selamat. Faktor-faktor yangterbukti berhubungan dengan perilaku tidak selamat adalah Psycological distress,Laziness, Mudah marah, Terburu-buru, Pamer, Ketidaknyamanan, Jumlahpekerjaan, Time pressure. Sedangkan, daktor-faktor yang terbukti mempengaruhiperilaku tidak selamat adalah Komitmen manajemen, Reward dan Penalty danTekanan Kelompok.Kata kunci: perilaku tidak selamat, proyek konstruksi, gheothermal power project.

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This research is about the analysis of related factors to safety behaviour onUlubelu Project Worker Units 3 and 4, Gheothermal Power Project di PT. X.Accidents are generally caused by two things, unsafe work behaviour (unsafe act)and unsafe working conditions (unsafe condition). Heinrich (1980), estimates that85% of accidents are the contribution of unsafe work behaviour (unsafe act). Basedon this research, it can be said that human behaviour is an important element thatrole in causing an accindent.This is the observational-quantitative reasearch with cross sectional designstudies. Independent variables which include on this reaseaarch are personal factors(Psycological distress, Laziness, being angry, in a rush, show off, and beinguncomfortable), Job Factors (Numbers of Jobs and Time Pressure), ManagementFactors (Supervision, Management Commitment, Reward and Penalty), andWorkgroup factors (Group Pressure). Dependen variables which include on thisresearch is Unsafety Behaviour. With 158 respondents of Ulubelu Project Workers,researcher used chi-square for bivariate analysis. The result, 75 workers (47%) haveunsafety behaviour and the other 83 workers (53%) have safety behavior in doingan Geothermal Power Project for Ulubelu. Factors which shown to be related withunsafety behaviour are Psycological distress, Laziness, being angry, in hurry, showoff, being unconfortable, numbers of jobs, Time pressure. And for Managementcommitment, Reward and Penalty, and Group preassure are shown not to be relatedto unsafe behaviour in this research.Keywords: Unsafe Act, Construction Project, Gheothermal Power Project.